Electric water heater



May 1, 1923.

Z. TROTZER ELECTRIC WATER HEATER Filed NOV. 1 1921 7 Zane/ a,

so arranged in the electric circ l'etcntecl May it, 1923- UNETE STATESlATENT OFFICE.

ZOLTAN TRGTZER, OF BUDAPEST, HUNGARY.

ELECTRIC WATER HEATER.

Application filed November To all 20 [mm it may concern Be it known thatl, ZoL'niN Tnorznn, director, a CltlZI1 oi Hung" y, residing atBudapest, in Hungary, have inventetv cor tain new and use'l ulImprovements in Electric Water Heaters, of which the following; is aspecification.

My invention relates to in'iprovcments in electric .val;er-heaters andmore especially 1) to such heaters to be used in direct connection withwater supply pipes, the objec being to draw according "to therequirements cold or hot water from the apparatus.

For this purpose I provide besides the 3 choked water passageleadingalon the heating body another direct channel shunting the former,being'tree from thrijittlino; and insert in the said directwater-channel a valve positively coupled with the switch iit of theheating body, to close the circuit ii the valve is pressed by thewater-pressure ayaiinst its closing thereby the direct water channel.

In the annexed drawing I have shown as 5 an example an embodiment of myinvention in diagrammatic sectional elevation.

Fig. 1 shows the parts in their relative position for the delivery ofcold water and Fig. 2 in the position delivering hot 0 water.

With reference to the drawings:

1 is a receptacle with a central tube 2 and 3 is an electric resistanceheater located in the annular space between receptacle 1 and tube 2. Oneterminal of the heating resistance is connected with contact and theother terminal with one wire of a cable 3O leading; to an electriccurrent source, while the other wire of said cable is comiected tocontact 5.

A tubular member 6 surrounding the lower end 01 the central tube 2projecting,- from the bottom of the apparatus and adapted to slidethereon is provided with a flange 7 and a contact disc 8. A spring 9tends to press the tubular member 6 together with the contact disc 8into its upper position shown in Fig. 1.

12 is a valve and 11 a rod secured thereto and bearing against aperforated plate located near the delivery end of the tubular member.

The Washer 13 on the upper end of the central tube 2 serves as seat forthe valve 12.

The heating body 3 divides the annular spaces between the receptacle 1and the tube 1, 1921. Serial No. 512,103.

into two concentric annular chambers 1d and 15 communicating at theirbottom by means of the opening 16 in the heating body The inner annularchamber to communicates at its top by means of the opening 17 of tube 2diumet-rally opposed to opening- 16 with the interior oli tube 2.Chamber 15 is closed a 18 and the inlet connecting; branch 19 extends tothe cover 16. Thus the water flowing; through the connecting branch 19can enter the inner chamber 14 only through the small opening 20diametrally opposite to opening;

The inlet connecting branch 19 is pro vided with a stuiling lining 21 toensure a watertight connection with the spigot 22.

In operation the water entering from the spigot the connecting branch 10flows round the valve disc 12, enters through opening the interior or"the central tube 2, and leaves the apparatus through the delivery end 26ot the tubular member 6 without coming in touch with the heating body 3.The electric current being interrupted between the contact disc 8 andthe contacts d and 5 respectively, cold water is delivered withoutthrottling.

If however hot water is required, the tubular member 6 is slightlypulled downwards against the pressure of spring; 9. therebv t-hrottlino'tie passage of the water below the valve 12 and the pressure acting'upon the valve overcomes the spring 9 and presses this latter againstits seat 13. By means of rod 11 and the perforated plate 10 the tubularmember 6 will be depressed into its lowest position shown in Fig. 2.where it will be held against the pressure of spring 9. In this positioncontact disc 8 closes with contacts and 5 the circuit through theheating body 6 The water is compelled to pass through the small bore 20into the outer annular space 1 circulates from top to bottom alone; theouter surface of the heating body and enters at the opposite sidethrough aperture 16 the inner annular space 15. In this latter the waterflows along the inner surface of the heating body from bottom to top andis delivered at the opposite side through opening 17 into the centraltube 2.

Owing; to the choking; action of the suia l bore 20, the pressure actingupon valve 12 will be maintained and at the san'ie time the quautitv oftie water passing the appm'atw: reduced in a measure to ensure theheating to the desired temperature. This latter can be regulated byadjusting the throttling screw 27.

By closing the spigot, the pressure acting upon valve i2 is removed andthe spring 9 lifts the tubular member 6 with the contact disc 8,interrupting thereby the electric circuit.

Owing to the large dian'ieter of the tube 2 no siphon effect will drawoh. the water from the spaces 14 and 1.5 and the heating body 3 will bekept constantly under water.

The interruption of the circuit at the con tacts t, 5 is a momentaiyone.

As it is to be seen the apparatus adjusts itscll automatically for thedelivery oi cold water needed more often and the cold water will bedelivered just as freely as if no heating apparatus were connected tothe tap. The apparatus does not interfere in any way with the ready useof cold water and throttles the water flow only it hot water isrequired.

Any suitable means may be provided for connecting the heating apparatuswith the water tap.

Having now fully described and ascertained my said invention and themanner in which it is to be performed, I declare that what I claim is:

1. In an electric water heating apparatus, a receptacle, anelectricheatingbody therein, a water passage leading along said heating. body,and constructed to permit a relatively slow flow of water, another waterpas sage shunting the former passage and constructed to permit arelatively rapid flow oi water. a valve inserted. in said shuntingpassage, coupled with a switch inserted in the circuit of theheatingbody and means tending to open the said valve and the switch.

2. In an electric water heating apparatus. a receptacle, an electricheating body therein, a water passage leading along said heat ing body,ztndeonstrueted to permit relatively slow flow of water, an adjustablethrottling screw inserted in said water passage, another water passageshunting the former passage, and constructed to permit arelatively rapidflow of water, a valve inserted in said shunting passage coupled with aswitch inserted in the circuit of the heating body and means tending toopen the said valve and the switch.

3. In an electric water heating apparatus, a receptacle, an electricheating body therein, a water passage leading along said heating body,and constructed to permit a relatively slow flow of water. a centraloutlet tube shunting the former passage. and constructed to permit arelatively rapid flow of water, a valve inserted in said outlet tube, atubular member adapted to slide on said outlet tube and coupled with aswitch inserted in the circuit of the heating body and means tending tolift the said tubular member and valve.

4:. In an electric water heating apparatus, a receptacle, an electricheating body therein, awater passage leading along said heating bodywithin the receptacle, and constructed to permit a relatively slow flowof water, an adjustable throttling screw inserted in said water passage,a central out let tube shunting the former passage and projecting fromthe bottom of said rece tacle, said tube permitting a relatively rapldflow of water, a valve inserted in said outlet tube, a tubular memberadapted to slide ZOLTAN TROTZER.

Witnesses EUGENE HAREANY, LI'LI STERN.

